Performance of various triggers used in the Supersymmetry group in early 2018 data (CMS DP-2018/049)


ele8_B-1.png HLT_DoubleEle8_CaloIdM_TrackIdM_Mass8_DZ_PFHT350: electron leg (barrel)
The efficiency of the electron leg of a High-Level Trigger (HLT) algorithm that requires two well-identified electrons with a transverse momentum pT greater than 8 GeV, an invariant mass greater than 8 GeV, and a hadronic transverse energy HT greater than 350 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. Tight conditions are applied on the transverse and longitudinal shower shapes of the electrons. The algorithm also requires a difference of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two electromagnetic objects with a transverse energy greater than 8 GeV and HT > 300 GeV.
The black points, and the associated y axis on the left, correspond to the efficiency of the electron pT , identification, and DZ criteria. It is calculated using a tag-and-probe method with Z in ee events recorded by two trigger algorithms: the first one requires an isolated electron with pT > 35 GeV ; the second one requires an electron with pT > 15 GeV and HT > 450 GeV. The efficiency is shown as a function of the offline electron pT , for electrons reconstructed in the central part of the electromagnetic calorimeter (abs(eta)< 1.479). The HLT dielectron mass criterion has been studied separately, and it is shown to be fully efficient in the phase space region of interest.
The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 2 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

ele8_E-1.png HLT_DoubleEle8_CaloIdM_TrackIdM_Mass8_DZ_PFHT350: electron leg (endcap)
The efficiency of the electron leg of a High-Level Trigger (HLT) algorithm that requires two well-identified electrons with a transverse momentum pT greater than 8 GeV, an invariant mass greater than 8 GeV, and a hadronic transverse energy HT greater than 350 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. Tight conditions are applied on the transverse and longitudinal shower shapes of the electrons. The algorithm also requires a diffeerence of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two electromagnetic objects with a transverse energy greater than 8 GeV and HT > 300 GeV.
The black points, and the associated y axis on the left, correspond to the efficiency of the electron pT , identification, and DZ criteria. It is calculated using a tag-and-probe method with Z in ee events recorded by two trigger algorithms: the first one requires an isolated electron with pT > 35 GeV ; the second one requires an electron with pT > 15 GeV and HT > 450 GeV. The efficiency is shown as a function of the offline electron pT, for electrons reconstructed in the endcap part of the electromagnetic calorimeter (abs(eta) > 1.479). The HLT dielectron mass criterion has been studied separately, and it is shown to be fully efficient in the phase space region of interest.
The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 2 Hz for an instantaneous luminosity of 1.8 X 1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

photon110-1.png HLT_Photon110EB_TightID_TightIso
The efficiency of a High-Level Trigger (HLT) algorithm that requires a well-identified and isolated photon in the central part of the electromagnetic calorimeter (abs(eta)< 1.479), with a transverse momentum pT greater than 110 GeV. The Level-1 (L1) trigger condition requires an electromagnetic object with a transverse energy greater than 40 GeV. The black points, and the associated y axis on the left, correspond to the efficiency of this algorithm, as a function of the offline photon pT . It is calculated using a tag-and-probe method with Z in ee events recorded by a trigger algorithm that requires an isolated electron with pT > 35 GeV. The probe electron is treated and reconstructed as a photon passing standard isolation and identification requirements. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 12 Hz for an instantaneous luminosity of 1.8 X 1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version] [Get png version linx] [Get pdf version linx]
Contact: Laurent Thomas

photon200-1.png HLT_Photon200
The efficiency of a High-Level Trigger (HLT) algorithm that requires a photon with a transverse momentum pT greater than 200 GeV. Very loose identification criteria are applied in this algorithm. The Level-1 (L1) trigger condition requires an electromagnetic object with a transverse energy greater than 40 GeV. The black points, and the associated y axis on the left, correspond to the efficiency of this algorithm, as a function of the offline photon pT. The efficiency is calculated using a tag-and-probe method with Z in ee events recorded by a trigger algorithm that requires an isolated electron with pT > 35 GeV. The probe electron is treated and reconstructed as a photon passing standard isolation and identification requirements. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 13 Hz for an instantaneous luminosity of 1.8 X 1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version] [Get png version linx] [Get pdf version linx]
Contact: Laurent Thomas

mu4_barrel-1.png HLT_DoubleMu4_Mass3p8_DZ_PFHT350: Muon leg (barrel)
The efficiency of the muon leg in a High-Level Trigger (HLT) algorithm that requires two muons with a transverse momentum pT greater than 4 GeV, an invariant mass greater than 3.8 GeV, and a hadronic transverse energy HT greater than 350 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta)< 2.5. The algorithm also requires a difference of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two muons with pT > 3 GeV and HT > 250 GeV. The black points, and the associated y axis on the left, correspond to the efficiency of the muon pT and DZ criteria. It is calculated using a tag-and-probe method with Z in mumu events recorded by two trigger algorithms: the first one requires an isolated muon with pT > 27 GeV ; the second one requires a muon with pT > 15 GeV and HT > 450 GeV. The efficiency is shown as a function of the offline muon pT , for muons reconstructed in the central part of the muon detector (abs(eta) < 1.25). The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 4.5 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

mu4_endcaps-1.png HLT_DoubleMu4_Mass3p8_DZ_PFHT350: Muon leg (endcaps)
The efficiency of the muon leg in a High-Level Trigger (HLT) algorithm that requires two muons with a transverse momentum pT greater than 4 GeV, an invariant mass greater than 3.8 GeV, and a hadronic transverse energy HT greater than 350 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta)< 2.5. The algorithm also requires a difference of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two muons with pT > 3 GeV and HT > 250 GeV. The black points, and the associated y axis on the left, correspond to the efficiency of the muon pT and DZ criteria. It is calculated using a tag-and-probe method with Z in mumu events recorded by two trigger algorithms: the first one requires an isolated muon with pT > 27 GeV ; the second one requires a muon with pT > 15 GeV and HT > 45 GeV. The efficiency is shown as a function of the offline muon pT , for muons reconstructed in the endcap part of the muon detector (abs(eta) > 1.25). The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 4.5 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

mass3p8-1.png HLT_Mu17_TrkIsoVVL_Mu8_TrkIsoVVL_DZ_Mass3p8: Mass leg
The efficiency of the dimuon invariant mass criterion in a High-Level Trigger (HLT) algorithm that requires two isolated muons with a transverse momentum pT greater than 17 and 8 GeV and an invariant mass greater than 3.8 GeV. The algorithm also requires a difference of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two muons with pT > 15 GeV and 7 GeV. The black points, and the associated y axis on the left, correspond to the efficiency of the mass criterion. It is calculated using dimuon events recorded by two trigger algorithms. The first one requires an isolated muon with pT > 27 GeV. The second one requires two muons with pT > 17 GeV and pT > 8 GeV. The latter algorithm is prescaled: it is run only for a given fraction of events accepted at L1. The efficiency is shown as a function of the offline dimuon invariant mass. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 28 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50. The mass condition reduces the rate by 30%, mostly by rejecting efficiently muon pairs from J/Psi decays.
[Get pdf version]
Contact: Laurent Thomas

ht350-1.png HLT_DoubleMu4_Mass3p8_DZ_PFHT350: HT leg
The efficiency of the HT leg in a High-Level Trigger (HLT) algorithm that requires two muons with a transverse momentum pT greater than 4 GeV, an invariant mass greater than 3.8 GeV, and a hadronic transverse energy HT greater than 350 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. The algorithm also requires a difference of longitudinal impact parameter (with respect to the leading primary vertex) DZ < 0.2 cm. The Level-1 (L1) trigger condition requires two muons with pT > 3 GeV and HT > 250 GeV. At Level 1, jets are reconstructed based on the calorimeter information only and do not include muons. The black points, and the associated y axis on the left, correspond to the efficiency of the HT criterion. It is calculated using events recorded by two trigger algorithms. The first one requires an isolated muon with pT > 27 GeV. The second one requires two muons with pT > 17 GeV and pT > 8 GeV with DZ < 0.2 cm and an invariant mass greater than 3.8 GeV. The selected events are also required to contain exactly two offline muons and no offline electron. The effciency is shown as a function of the offline HT , calculated from offline jets with abs(eta) < 2.4 that do not match geometrically offline muons or electrons. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 4.5 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

ht450-1.png HLT_Mu15_IsoVVVL_PFHT450: HT leg
The efficiency of the HT leg in a High-Level Trigger (HLT) algorithm that requires one loosely isolated muon with a transverse momentum (pT ) greater than 15 GeV and a hadronic transverse energy HT greater than 450 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. The Level-1 (L1) trigger condition requires HT > 360 GeV. At Level 1, jets are reconstructed based on the calorimeter information only and do not include muons. The black points, and the associated y axis on the left, correspond to the efficiency of the HT criterion. It is calculated using events recorded by a trigger algorithm requiring an isolated muon with pT > 27 GeV. The selected events are also required to contain exactly one offline muon and no offline electron. The efficiency is shown as a function of the offline HT , calculated from offline jets with abs(eta)< 2.4 that do not match geometrically offline muons or electrons. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 5 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

ht1050-1.png HLT_PFHT1050
The efficiency of a High-Level Trigger (HLT) algorithm that requires a hadronic transverse energy HT greater than 1050 GeV. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. The Level-1 (L1) trigger condition requires HT > 360 GeV. At Level 1, jets are reconstructed based on the calorimeter information only and do not include muons. The black points, and the associated y axis on the left, correspond to the efficiency. It is calculated using events recorded by a trigger algorithm requiring an isolated muon with pT > 27 GeV. The selected events are also required to contain exactly one offline muon and no offline electron. The efficiency is shown as a function of the offline HT , calculated from offline jets with abs(eta) < 2.4 that do not match geometrically offline muons or electrons. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 10 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

metnomu120-1.png HLT_PFMETNoMu120_PFMHTNoMu120_IDTight_PFHT60
The efficiency of a High-Level Trigger (HLT) algorithm that requires a missing transverse energy MET greater than 120 GeV, a missing transverse hadronic energy MHT greater than 120 GeV, and a transverse hadronic energy HT greater than 60 GeV. MET is defined as the amplitude of the negative vector sum of the transverse momentum pT of all particle candidates. MHT is defined as the amplitude of the negative vector sum of the transverse momentum pT of all jets with pT > 20 GeV and abs(eta) < 5 that pass tight identification criteria based on their components and charged/neutral hadronic/electromagnetic energy fractions. The calculation of both MET and MHT excludes the contribution from all muons in the event. HT is defined as the scalar pT sum of all reconstructed jets that have pT > 30 GeV and abs(eta) < 2.5. The Level 1 condition requires at least 100 or 110 GeV of MET and at least 60 GeV of HT. At Level 1, jets (MET) are reconstructed (is calculated) based on the calorimeter information only and do not (does not) include muons. The black points, and the associated y axis on the left, correspond to the efficiency. It is calculated using events recorded by a trigger requiring an isolated high pT muon (> 27 GeV). The selected events are also required to contain exactly one offline muon, no offline electron and have HT > 100 GeV. The efficiency is shown as a function of the offline MET, also excluding muons from the energy sum. The numerator (filled histogram) and denominator (dashed line) entering the efficiency calculation are also shown (y axis on the right). Their last bin includes the overflow entries. The rate of this HLT algorithm is 23 Hz for an instantaneous luminosity of 1.8X1034 Hz cm-2 and an average pileup (secondary pp collisions occuring in an LHC proton bunch crossing) of 50.
[Get pdf version]
Contact: Laurent Thomas

-- ElisabettaGallo - 2018-07-17

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